Process launcher updates (#6183)

* Enable process and ap connection tests on linux
* Updated 'OpenProjectManager' to use new the ProcessLauncher argument type
* Add logic to double-escape escaped double quotes in arguments on windows platforms
* Updated argument for LaunchProjectManager to reflect new ProcessLauncher argument type
* Fixed unit test arguments for 'arg=value' condition
* Fix compile errors for BuilderManager and RHI.Edit\Utils.cpp
* PAL'ify the GetCommandLineParametersAsString() to handle windows specific behavior

Signed-off-by: Steve Pham <82231385+spham-amzn@users.noreply.github.com>

Co-authored-by: byrcolin <byrcolin@amazon.com>

Code/Tools/ProjectManager/Source/ProjectsScreen.cpp

@@ -424,12 +424,12 @@ namespace O3DE::ProjectManager
                     return;
                 }
 
-                auto cmdPath = AZ::IO::FixedMaxPathString::format(
-                    "%s --regset=\"/Amazon/AzCore/Bootstrap/project_path=%s\"", editorExecutablePath.c_str(),
-                    fixedProjectPath.c_str());
-
                 AzFramework::ProcessLauncher::ProcessLaunchInfo processLaunchInfo;
-                processLaunchInfo.m_commandlineParameters = cmdPath;
+                processLaunchInfo.m_commandlineParameters = AZStd::vector<AZStd::string>{
+                    editorExecutablePath.String(),
+                    AZStd::string::format(R"(--regset="/Amazon/AzCore/Bootstrap/project_path=%s")", fixedProjectPath.c_str())
+                };
+                ;
                 bool launchSucceeded = AzFramework::ProcessLauncher::LaunchUnwatchedProcess(processLaunchInfo);
                 if (!launchSucceeded)
                 {